"You must be the change you wish to see in the world."

另一个人的心是一片黑暗的森林，无论它曾经多么接近自己的心。

The oldest， shortest words—'yes' and 'no'—are those which require the most thought.

"The truth is a mirror, and the mirror is a game."

科学中的创新往往来自于以新的方式看待老问题。